TY - GEN
T1 - Design and evaluation of a variable-flux flux-intensifying interior permanent magnet machine
AU - Limsuwan, Natee
AU - Kato, Takashi
AU - Akatsu, Kan
AU - Lorenz, Robert D.
PY - 2012/12/17
Y1 - 2012/12/17
N2 - This paper presents a design approach for interior permanent magnet (IPM) machines with variable-flux characteristics using low coercive force magnet material for improved efficiency and extended operating speed range. A flux-intensifying interior permanent (FI-IPM) type having Ld > Lq is used in the design due to positive Id operation and reduced load Iq effects. Design consideration of machine structures and variable-flux machine attributes are discussed. In addition, leakage flux in a rotor is specially designed to obtain another degree-of-freedom in variable-flux control as well. Evaluation of the designed machine is provided using FEA simulations and experimental evaluation of a proof-of-principle prototype machine. The designed machine shows benefits in improving efficiency and extending the range of the torque-speed map when magnetization level of the low coercive force magnet is operated at the optimal levels.
AB - This paper presents a design approach for interior permanent magnet (IPM) machines with variable-flux characteristics using low coercive force magnet material for improved efficiency and extended operating speed range. A flux-intensifying interior permanent (FI-IPM) type having Ld > Lq is used in the design due to positive Id operation and reduced load Iq effects. Design consideration of machine structures and variable-flux machine attributes are discussed. In addition, leakage flux in a rotor is specially designed to obtain another degree-of-freedom in variable-flux control as well. Evaluation of the designed machine is provided using FEA simulations and experimental evaluation of a proof-of-principle prototype machine. The designed machine shows benefits in improving efficiency and extending the range of the torque-speed map when magnetization level of the low coercive force magnet is operated at the optimal levels.
KW - flux-intensifying
KW - interior permanent magnet
KW - low coercive force magnet
KW - machine design
KW - variable flux linkage
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U2 - 10.1109/ECCE.2012.6342480
DO - 10.1109/ECCE.2012.6342480
M3 - Conference contribution
AN - SCOPUS:84870947333
SN - 9781467308014
T3 - 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
SP - 3670
EP - 3677
BT - 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
T2 - 4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
Y2 - 15 September 2012 through 20 September 2012
ER -